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The Raindrop Detection Sensor module is an indispensable tool for anyone looking to build a weather-aware project. This simple yet effective rain sensor module for Arduino operates on the principle of resistive sensing. It consists of two key components: a durable, nickel-plated sensor board with conductive traces and a separate control board. When raindrops fall on the sensor board, they create a conductive path, which lowers the electrical resistance. The control board then measures this change, allowing your project to detect the presence of rain.

One of the most valuable technical features of this module is its dual output. It provides a continuous analog output (A0), which gives a voltage reading that is proportional to the amount of water on the sensor. This is perfect for projects that need to measure rainfall intensity, such as a DIY weather station. Additionally, it offers a simple digital output (D0) that acts as a switch, going from HIGH to LOW when a user-defined threshold is met. This threshold can be easily adjusted using the onboard potentiometer, giving you full control over the sensor's sensitivity.

Operating on a voltage range of 3.3V to 5V DC, the module is directly compatible with a wide range of microcontrollers. Its straightforward interface and reliance on a standard LM393 comparator make it an excellent choice for beginners and advanced users alike. Whether you're building an automated window closer for your smart home, a smart irrigation system that conserves water, or a robot that can navigate based on weather conditions, this raindrop detection sensor provides a reliable and cost-effective solution for all your DIY electronics projects.

The Raindrop Detection Sensor Module is a simple and effective solution for detecting rainfall or surface wetness. It includes a rainwater sensor plate and a signal conditioning board that provides both digital and analog outputs, allowing easy integration with Arduino, ESP8266, Raspberry Pi, and other development boards.

When water droplets make contact with the corrosion-resistant sensor plate, the module detects conductivity and signals a HIGH or LOW value. This setup is perfect for automated irrigation, window/roof closures, and weather-based triggering systems.

Key Features:

• Raindrops sensor module for detecting moisture and water presence

• Compatible with Arduino, Raspberry Pi, ESP32, and microcontrollers

• Analog & digital outputs with onboard potentiometer for sensitivity control

• Includes sensor board + signal processing module

• Ideal for smart agriculture, weather stations, rain alarms, and IoT

Technical Specifications:

How to Use with Arduino:

Wiring:

Module Pin	Arduino Pin
VCC	5V
GND	GND
AO	A0 (Analog Input)
DO	D7 (Digital Input)

 

 

Sample Arduino Code:

int rainDigital = 7;
int rainAnalog = A0;

void setup() {
  Serial.begin(9600);
  pinMode(rainDigital, INPUT);
}

void loop() {
  int digitalVal = digitalRead(rainDigital);
  int analogVal = analogRead(rainAnalog);

  Serial.print("Digital: ");
  Serial.print(digitalVal);
  Serial.print(" | Analog: ");
  Serial.println(analogVal);

  delay(1000);
}

Applications:

• Rain detection and alarms

• Smart irrigation systems

• Weather monitoring stations

• Automatic roof/window control systems

• DIY electronics & Arduino weather projects

Package Includes:

• 1 × Raindrop Sensor Plate

• 1 × Signal Conditioning Module

• 1 × Connecting Cable